<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right" class="setpadd">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert title="注意：只允许为第三级分类设置相关参数！" type="warning" show-icon :closable="false"></el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>请选择商品分类：</span>
          <!-- 选择商品分类的级联选择器 -->
          <el-cascader
            v-model="selectedKeys"
            :options="cateList"
            :props="cascaderProps"
            @change="cateChange"
            clearable
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tabs标签页区域 -->
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <!-- 添加动态参数的面版 -->
        <el-tab-pane label="动态参数" name="many">
          <!-- 添加参数的按钮 -->
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="showAddDialog"
          >添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table :data="tableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag
                  v-for="(item,i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >{{item}}</el-tag>
                <!-- 输入的文本框 每个文本框各自的属性值 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <!-- 添加按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditParams(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的面版 -->
        <el-tab-pane label="静态属性" name="only">
          <!-- 添加参数的按钮 -->
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="showAddDialog"
          >添加参数</el-button>
          <!-- 静态属性表格 -->
          <el-table :data="tableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag
                  v-for="(item,i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >{{item}}</el-tag>
                <!-- 输入的文本框 每个文本框各自的属性值 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <!-- 添加按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditParams(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数对话框 -->
    <el-dialog :title="'添加'+titleText" :visible.sync="addDialogVisible" @close="addDialogClose">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数对话框 -->
    <el-dialog :title="'修改'+titleText" :visible.sync="editDialogVisible" @close="editDialogClose">
      <!-- 内容主体区域 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
    <!--  -->
  </div>
</template>
<script>
import {
  getCateList,
  getTabClicked,
  submitParams,
  editParams,
  submitEditParams,
  delParams
} from "@/api/categories";

export default {
  data() {
    return {
      // 选中的父级分组ID数组
      selectedKeys: [],
      // 商品分类列表
      cateList: [],
      // 配置选项
      cascaderProps: {
        // 次级菜单的展开方式
        expandTrigger: "hover",
        // 指定选项的值为选项对象的某个属性值
        value: "cat_id",
        // 指定选项标签为选项对象的某个属性值
        label: "cat_name",
        // 指定选项的子选项为选项对象的某个属性值
        children: "children"
      },
      // 被激活的页签的名称
      activeName: "many",
      // 动态参数的数据
      /*  manyTableData: [], */
      // 静态属性的数据
      /*  onlyTableData: [], */
      // 获取的数据
      tableData: [],
      // 添加参数对话框的显示
      addDialogVisible: false,
      // 添加数据对象
      addForm: {
        attr_name: ""
      },
      // 添加数据的验证规则
      addFormRules: {
        attr_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" }
        ]
      },
      // 修改参数对话框的显示
      editDialogVisible: false,
      // 修改参数数据对象
      editForm: {
        attr_name: ""
      },
      // 修改参数数据的验证规则
      editFormRules: {
        attr_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" }
        ]
      }
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    // 获取分类列表
    async getCateList() {
      const res = await getCateList();
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据列表失败！");
      }
      this.cateList = res.data;
      /* console.log(this.cateList) */
    },
    // 级联选择器选中项变化，会触发这个函数
    cateChange() {
      // 选中的,不是三级分类
      if (this.selectedKeys.length !== 3) {
        this.selectedKeys = [];
        this.tableData = [];
        return;
      }
      // 证明选中的,是三级分类
      // console.log(this.selectedKeys)
      this.getParamsList();
    },
    // tab页签点击事件的处理函数
    handleClick() {
      this.getParamsList();
    },
    // 获取分类参数列表
    async getParamsList() {
      const res = await getTabClicked({
        cateId: this.cateId,
        sel: this.activeName
      });
      if (res.meta.status !== 200) {
        return this.$message.warning("请选择三级分类");
      }
      // 将得到的数据进行forEach循环，将字符串attr_vals，转换成数组
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
        // 控制文本框的显示与隐藏
        item.inputVisible = false;
        // 文本框中输入的值
        item.inputValue = "";
      });
      // console.log(res.data)
      this.tableData = res.data;
      // 不同的表格渲染不同的数据
      /* if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else { this.onlyTableData = res.data } */
    },
    // 展示添加参数对话框
    showAddDialog() {
      this.addDialogVisible = true;
    },
    // 监听添加对话框关闭
    addDialogClose() {
      this.$refs.addFormRef.resetFields();
    },
    // 确定添加参数
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return;
        const res = await submitParams({
          cateId: this.cateId,
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        });

        if (res.meta.status !== 201) {
          return this.$message.error("添加失败！");
        }
        this.$message.success("添加成功！");
        this.addDialogVisible = false;
        this.getParamsList();
      });
    },
    // 展示修改参数对话框
    async showEditParams(attrId) {
      this.editDialogVisible = true;
      const res = await editParams({
        cateId: this.cateId,
        attrId: attrId,
        attr_sel: this.activeName
      });
      if (res.meta.status !== 200) {
        return this.$message.error("查询参数失败！");
      }
      this.editForm = res.data;
    },
    // 监听添加对话框关闭
    editDialogClose() {
      this.$refs.editFormRef.resetFields();
    },
    // 确定修改参数
    editParams() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return;
        const res = await submitEditParams({
          cateId: this.cateId,
          attr_id: this.editForm.attr_id,
          attr_name: this.editForm.attr_name,
          attr_sel: this.activeName
        });
        if (res.meta.status !== 200) {
          return this.$message.error("更新失败！");
        }
        this.$message.success("更新成功！");
        this.editDialogVisible = false;
        this.getParamsList();
      });
    },
    // 删除参数
    removeParams(attrId) {
      this.$confirm("此操作将永久删除该参数, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
        // 确认后的操作
      })
        .then(async () => {
          const res = await delParams({ cateId: this.cateId, attrId: attrId });
          if (res.meta.status !== 200) {
            return this.$message.error("删除参数失败！");
          }
          this.$message.success("删除参数成功！");
          this.getParamsList();
          // 失败后的操作
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除"
          });
        });
    },
    // 文本框失去焦点，或摁下Enter键触发
    handleInputConfirm(row) {
      // 删除字符串首尾的空白格
      if (row.inputValue.trim().length === 0) {
        row.inputValue = "";
        row.inputVisible = false;
        return;
      }
      // 如果没有return，则怎么输入的内容需要做后续处理
      row.attr_vals.push(row.inputValue.trim());
      row.inputValue = "";
      row.inputVisible = false;
      // 需要发起请求，保存这次操作
      this.saveAttrVals(row);
    },
    // 点击按钮，展示文本输入框
    showInput(row) {
      row.inputVisible = true;
      // 让文本框自动获得焦点
      // $nextTick 方法的作用 就是当页面上元素被重新渲染之后，才会指定回调函数中的代码
      this.$nextTick(() => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    // 将对 attr_vals的操作，保存到数据库中
    async saveAttrVals(row) {
      // 需要发起请求，保存这次操作
      const res = await submitEditParams({
        cateId: this.cateId,
        attr_id: row.attr_id,
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(" ")
      });
      if (res.meta.status !== 200) {
        return this.$message.error("修改参数可选项失败！");
      }
      this.$message.success("修改参数可选项成功！");
    },
    // 删除对应的参数可选项
    handleClose(i, row) {
      row.attr_vals.splice(i, 1);
      this.saveAttrVals(row);
    }
  },
  // 计算属性
  computed: {
    // 通过返回的布尔值，控制是否禁用按钮
    isBtnDisabled() {
      if (this.selectedKeys.length !== 3) {
        return true;
      }
      return false;
    },
    // 当前选中的三级分类的Id
    cateId() {
      if (this.selectedKeys.length === 3) {
        return this.selectedKeys[2];
      }
      return null;
    },
    //
    titleText() {
      if (this.activeName === "many") {
        return "动态参数";
      }
      return "静态属性";
    }
  }
};
</script>
<style lang="scss" scoped>
.setpadd {
  padding: 10px 0;
}
.cat_opt {
  margin: 15px 0;
}
.el-cascader {
  width: 300px;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
  width: 150px;
}
</style>